A new study coming from market research Newzoo puts the pecuniary fortunes of the North American gaming market in 2010 in perspective: gamers spent almost $25 billion on games during the last year alone, but it wasn’t quite a banner year… that number’s down a smidge from 2009’s revenues.

According to Newzoo’s report, video games brought in about $24.7 billion in 2010, which is a 2% drop from 2009.

These numbers don’t include device or console sales, but refer to software only. That 2% drop isn’t ideal for game devs, but it’s no cause for concern: games are clearly still bringing in tons of money.

More interesting than the actual sales amounts, though, are the way that the pie slices resized themselves compared to 2009. It’s true that console games still take up the vast majority of that $24.7 billion, commanding a 43% slice at $10.6 billion in revenues, but social network based gaming (Facebook games) and mobile devices saw huge increases in revenue over 2009. Social network games alone saw a projected $1.5 billion in total sales within 2010, a meteoric 66% rise over the numbers of the year before. Meanwhile, mobile device saw an increase of 46% over 2009, selling over $1.6 billion.

Also chipping away at consoles’ dominance? Game downloads on the PC and Mac through digital delivery services like Steam, which saw sales increase by 60% to a target of $2.5 billion.

I wonder how the pie will redistribute itself again in 2011, as the likes of Facebook, the App Store and Steam continue to grow.